3rd Smilei user & training workshop

Session

Contributed talks

9 mars 2022, 11:45

Amphitheatre Arago (Ecole Polytechnique)

8. Fast PIC-simulation for LWFA target design optimization

Pierre Drobniak

09/03/2022 11:45

Oral presentation

Laser plasma acceleration [1] provides several advantages compared to conventional radio-frequency accelerators for electron source injectors: high accelerating gradients up to hundreds of gigavolts per meter (compactness) and short duration electron beams. However, the control of quality and stability of the produced electron bunches remain a challenge.
Here we focus on the target design...

7. Teaching computational plasma physics at Politecnico di Milano

Dr Arianna Formenti (Politecnico di Milano)

09/03/2022 12:10

Oral presentation

University-level introductory plasma physics courses typically address the theoretical modeling of plasmas with modules devoted to several different topics (e.g. charged particles’ orbits in an electromagnetic field, multi-fluid and magnetohydrodynamic models) but do not necessarily include a computational plasma module. However, computational tools can be valuable to teach both basic and...

6. Numerical investigation of high-energy photon emission in double-layer targets with particle-in-cell codes

Marta Galbiati (Politecnico di Milano)

09/03/2022 15:45

Oral presentation

High-energy photon emission can occur during the interaction of ultra-intense ($>10^{18}$ W/cm$^2$) lasers with plasma obtained from the ionization of a suitable target. This emission of electromagnetic radiation follows the generation of relativistic electrons during the interaction itself. Indeed, relativistic electrons can produce high-energy photons (keV-MeV energy range) thanks mainly to...

3. SFQEDtoolkit: a high-performance library for accurate modelling of strong-field QED effects in PIC and Monte Carlo codes

Samuele Montefiori (Max Planck Institut für Kernphysik)

09/03/2022 16:10

Oral presentation

Strong-field QED (SFQED) effects are central in determining the dynamics of particles and plasma in extreme electromagnetic fields such as those generated with multipetawatt lasers or present in the vicinity of compact astrophysical objects. SFQEDtoolkit is a fully open source library designed to allow for a straightforward implementation of SFQED effects in existing particle-in-cell (PIC) and...

1. Vacuum laser acceleration via laser-foil transparency

Feiyu Li

09/03/2022 16:35

Oral presentation

Intense lasers can accelerate electrons to very high energy over a short distance. Such compact accelerators have several potential applications including fast ignition, high energy physics, and radiography. Among the various schemes of laser-based electron acceleration, vacuum laser acceleration has the merits of super-high acceleration gradient and great simplicity. Yet its realization has...

9. Investigation of the homogeneity of energy conversion processes at dipolarization fronts from MMS measurements

Soboh ALQEEQ (LPP)

11/03/2022 11:00

Oral presentation

We report on six dipolarization fronts (DFs) embedded in fast earthward flows detected by the Magnetospheric Multiscale mission during a substorm event on 23 July 2017. We analyzed Ohm’s law for each event and found that ions are mostly decoupled from the magnetic field by Hall fields. However, the electron pressure gradient term is also contributing to the ion decoupling and likely...

5. Looking into solid-density plasmas with a pseudo-spectral solver and attosecond dispersion

Andréas Sundström (Chalmers University of Technology)

11/03/2022 11:25

Oral presentation

Extreme-ultraviolet pulses can propagate through ionized solid-density targets, unlike optical pulses, and thus have the potential to probe the interior of such plasmas on an attosecond time-scale. We present a synthetic diagnostic method for solid-density laser-generated plasmas based on the dispersion of an extreme-ultraviolet attosecond probe pulse, in a pump--probe scheme.

In our...

4. Isochoric Heating in Multilayer Targets upon Ultra High Intensity Laser Irradiation by Density Oscillation

Franziska Paschke-Bruehl (Helmholtz-Zentrum Dresden-Rossendorf (HZDR))

11/03/2022 11:50

Oral presentation

We will show how a multilayer target behaves under ultra high intensity laser irradiation, based on a SMILEI simulation study. We observe density oscillation, a dynamic, that has not been mentioned in plasma physics yet. It describes how neighboring layers repeatedly compress each other, causing the ion and electron density of each layer to oscillate over time. Based on that, we will show how...

2. Theoretical study of laser energy absorption in near-critical density plasmas at ultra-high intensity

Iuliana-Mariana Vladisavlevici (CELIA - University of Bordeaux; West University of Timisoara)

11/03/2022 12:15

Oral presentation

At the interaction of an ultra-high intensity laser pulse (I ≥ 1018W/cm2) with a plasma, the plasma constituents will absorb a significant part of the laser energy and will be accelerated up to relativistic velocities for electrons. The most predominant mechanisms of energy transfer from the laser pulse to the plasma constituents are collisionless in this regime, being done by collective...